Cylinder 8 Injector Circuit Low
The P0282 code indicates that the Engine Control Module (ECM) has detected a low voltage or resistance condition in the electrical circuit of the fuel injector for cylinder 8. This typically means the injector circuit is drawing less current than expected, which can be caused by a faulty injector, wiring issues, or a poor electrical connection. The ECM monitors the injector driver circuit and sets this code when the voltage is below the specified threshold.
01. Most Common Causes
- Faulty fuel injector on cylinder 8
- Open or shorted wiring in the injector circuit
- Poor electrical connection at the injector or ECM
- Failed ECM (rare)
02. Symptoms You Will Notice
- Engine misfire on cylinder 8
- Rough idle or hesitation
- Check Engine Light illuminated
- Decreased fuel economy
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for other related codes.
Step 2: Visually inspect the wiring and connector for cylinder 8 injector for damage, corrosion, or loose connections.
Step 3: Measure the resistance of the injector with a multimeter; compare to manufacturer specs (typically 12-16 ohms).
Step 4: Check for voltage at the injector connector with the engine running; should see battery voltage with a pulsed ground signal.
Step 5: If injector and wiring are good, test the ECM output by swapping injectors or using a noid light.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive for extended periods as it can cause engine misfire, catalytic converter damage, and reduced fuel economy. Immediate diagnosis is advised.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts and labor. A single injector replacement is around $100-$200, plus diagnostic time.